The season four finale 'A' ended with Grimes reunited with his former prison crew, while being captured by hostile forces at the supposed haven known as Terminus.

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When the episode aired in the US, it scored record-breaking ratings. According to preliminary figures, 15.7 million viewers tuned in to see the conclusion of the show's latest season on AMC, becoming the most watched finale of the series so far.

The Walking Dead returns later this year to AMC in the US and Fox in the UK.